↑ 1.01.1 Douglas Richardson. Magna Carta Ancestry: A Study in Colonial and Medieval Families, 4 vols, ed. Kimball G. Everingham, 2nd edition (Salt Lake City: the author, 2011), Vol. II, pp. 81-82, DIGGE£S 12, Google Books
↑ 2.02.1 Douglas Richardson. Royal Ancestry: A Study in Colonial and Medieval Families, 5 vols, ed. Kimball G. Everingham (Salt Lake City: the author, 2013), Vol. III, pp. 104-105, GRANDISON 11